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https://issues.apache.org/jira/browse/FLINK-5855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15980624#comment-15980624
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mingleizhang commented on FLINK-5855:
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[~tedyu] Hi, Ted. I would ask if {code}pendingFilesPerCheckpoint {code} prior
to the call of {code}handlePendingFilesForPreviousCheckpoints{code}. It is a
maybe that the it has alreay removed all elements from the map. Then trigger
the {code}handlePendingFilesForPreviousCheckpoints{code}. Is there a problem
should occur here ? CC [~till.rohrmann]
> Unprotected access to pendingFilesPerCheckpoint in BucketingSink
> ----------------------------------------------------------------
>
> Key: FLINK-5855
> URL: https://issues.apache.org/jira/browse/FLINK-5855
> Project: Flink
> Issue Type: Bug
> Components: Streaming Connectors
> Reporter: Ted Yu
> Priority: Minor
>
> {code}
> handlePendingFilesForPreviousCheckpoints(restoredState.pendingFilesPerCheckpoint);
> synchronized (restoredState.pendingFilesPerCheckpoint) {
> restoredState.pendingFilesPerCheckpoint.clear();
> {code}
> Lock on pendingFilesPerCheckpoint should be obtained prior to the call to
> handlePendingFilesForPreviousCheckpoints().
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